Luke Jerram, Aeolus - Canada Square Park, Canary Wharf

Aeolus is an acoustic and optical pavilion designed to resonate and sing in the wind with no eletrical power or amplification - a giant Aeolian harp. Through vibrations in harp strings attached to some of the tubes the artwork really does sing in the wind. The tubes also hum at a series of low frequencies.

Apparently Aeolus was inspired by a trip Jerram made to Iran where a well-digger spoke of the wells singing in the wind.

http://www.lukejerram.com/aeolus